For ideal water flow, fit your pipes with cap from Harvel Clear. This cap has a maximum temperature of 140 degrees F. This fitting falls into the caps sub-category and into fittings schedule 40. It comes in clear. It fits a pipe size of 3". The cap has a maximum pressure of 155 psi at 73 Degrees F. Standards include: NSF 61 Rated, ASTM D.1784, NS14-14, FDA Regulations 175.300,178.2650, And 178.3790.